<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>权限列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 角色列表区域 -->
      <el-table :data="rolelist" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row :class="['bdbottom',i1 === 0 ? 'bdtop' : '','vcenter']" v-for="(item1,i1) in scope.row.children"
              :key="item1.id">
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过 for 循环 嵌套渲染二级权限-->
                <el-row :class="[i2 === 0 ? '' : 'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag type="warning" v-for="item3 in item2.children" :key="item3.id" closable @close="removeRightById(scope.row, item3.id)">
                      {{item3.authName}}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <!--  <pre>
              {{scope.row}}
            </pre> -->
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index" label="序号"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
            <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
            <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!--分配权限的对话框-->
    <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
      <!-- 树形控件 -->
      <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all="true" :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
  export default {
    data() {
      return {
        // 所有角色列表数据
        rolelist: [],
        // 控制分配权限对话框的显示与隐藏
        setRightDialogVisible: false,
        // 所有权限的数据
        rightslist: [],
        // 树形控件的属性绑定对象
        treeProps: {
          label: 'authName',
          children: 'children'
        },
        // 默认选中的节点ID值数组
        defKeys: [],
        // 当前即将分配角色的id
        roleId: ''
      }
    },
    created() {
      this.getRolesList()
    },
    methods: {
      // 获取所有角色的列表
      async getRolesList() {
        const {
          data: res
        } = await this.$http.get('roles')
        if (res.meta.status !== 200) {
          return this.$message.error('获取数据失败')
        }
        this.rolelist = res.data

      },
      // 根据id删除对应的权限
      async removeRightById(role, rightId) {
        // 弹框提示用户是否要删除
        const confirmResult = await this.$confirm('确定要删除该权限', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)

        if (confirmResult !== 'confirm') {
          return this.$message.info('取消了删除')
        }
        const {
          data: res
        } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
        if (res.meta.status !== 200) {
          return this.$message.error('删除权限失败')
        }
        // 刷新权限列表
        // this.getRolesList()
        role.children = res.data
      },
      // 展示分配权限的对话框
      async showSetRightDialog(role) {
        this.roleId = role.id
        // 获取所有权限的数据
        const {data: res} = await this.$http.get('rights/tree')

        if (res.meta.status !== 200) {
          return this.$message.error('获取权限失败数据')
        }
        // 把获取到的权限数据保存到data中
        this.rightslist = res.data
        console.log(this.rightslist)
        // 递归获取三级节点的Id
        this.getLeafKeys(role, this.defKeys)
        this.setRightDialogVisible = true
      },
      // 通过递归的形式，获取角色下所有三级权限的id,并保存到defKeys数组中
      getLeafKeys (node,arr) {
        // 如果当前node节点不包含children属性，则是三级节点
        if (!node.children) {
          return arr.push(node.id)
        }
        node.children.forEach(item =>
        this.getLeafKeys(item, arr))
      },
      // 监听分配权限对话框的关闭事件
      setRightDialogClosed () {
        this.defKeys = []
      },
      // 点击为角色分配权限
      async allotRights () {
        const keys = [
          ...this.$refs.treeRef.getCheckedKeys(),
          ...this.$refs.treeRef.getHalfCheckedKeys()
        ]
        const idStr = keys.join(',')
        const {data: res} = await this.$http.post(`Roles/${this.roleId}/rights`, {rids: idStr})
        if (res.meta.status !== 200) {
          return this.$message.error('分配权限失败')
        }
        this.$message.success('分配权限成功')
        this.getRolesList()
        this.setRightDialogVisible = false
      }
    }
  }
</script>

<style lang="less" scoped>
  .el-tag {
    margin: 7px;
  }

  .bdtop {
    border-top: 1px solid #eee;
  }

  .bdbottom {
    border-bottom: 1px solid #eee;
  }

  .vcenter {
    display: flex;
    align-items: center;
  }
</style>
